Aluminum Dropouts have improved greatly from past versions. Current technology has made aluminum products stronger and more durable. With a case made from A356-T6 aluminum, and bearing caps made from one-piece7075-T6 billet with extra material is added in them along with a thru-bolt design these center sections are nearly indestructible. This new design results in 50% less deflection that can occur with other units on the market. Case is a 3/4" extended long nose and works with 3.25" carrier bearings. Kit is designed to withstand up to 1200hp.